Tool-holder.



E. STOEGKLIN.`

TOOL HOLDER.

APPLIOATION FILED nu 17, 1911.

1,022,760. Patented Apr.9,19'12.

UNITED STATES PATENT oEEIcE.

TOOL-HOLDER. i

' Specification of Letters latent. Application filed MayA 17,

Patented Apr. 9, 1912. 1911. serial No. 627,752.

, To all whom t may concern Be it known that I, ERNEST SToEcKLIN, a citizen of the United States, and resident of Ridgefield Park, in the county of Bergen 5 and State of New Jersey, have invented a sired position'in a rotative direction and to any desired position in a longitudinal direction within certain limits and clamped in such position.

My invention further contemplates means for holding tools of various sizes and character.

A practical embodiment ,of my invention is represented in the accompanying drawings, in which- Figure 1 represents in top plan a portion of the slide rest of a lathe with my improved holder mounted thereon with a tool carried thereby, portions of the tool bar .being broken away to more clearly illustrate the means for clamping the cutter in position, Fig. 2 is an end view of the part shown in Fig. 1, Fig. 3 is a section taken in the plane of the line A-A of Fig. 1, and Fig. 1 is a section taken in theJ plane of the line B-B of Fig. 2. n

The slide rest of the lathe is denoted by 1 and its longitudinally arranged undercut slot by 2. The tool holder comprises an outer member in the form of a split ring 3 and an inner member in the form of a divided bushing, one part being denoted by 4c and the other part by 5. l This divided bushing is rotatably adjustable in the split ring and it is provided with tool receiving holes 6 extending longitudinally therethrough, one portion of each hole being located within the part 4 and the other portion in the part 5. In the present instance I have shown six of these holes in an annular series, the said holes being of varying sizes and the walls between the adjacent holes 150..'Ibeing cut away to form slots 7 for permitting the withdrawal of the tool in either direction when the tool is released from its clamping engagement with the bushing, as will hereinafter more fully appear. This divided bushing 4, 5, is provided with a circumferential groove 8. A clamping bolt 9 has its head 10 tted to slide in the undercut slot 2.of the lathe, which bolt extends upwardly through the free ends of the ring 3 and it is provided with a nut 1l. This bolt 9-intersects the periphery of the divided bushing 21, 5, by entering the circumferential groove 8 inthe bushing for holding the bushing against longitudinal movement within the clamping ring 3 while permitting the bushing to be rotated within said clampingring when released from yits clamping engagement therewith. These tool receiving holes G may receive tools of variousflrinds. In the present instance I have shown a large size boring tool in position within the largest of the holes 6, which tool is constructedl as follows :-A hollow tool bar 12 is provided with alined diagonalk holes 13, 14, through its walls at one end of the bar for receiving the cutter 15. At its other end, the said hollow bar 12 is provided with alined holes 16, 17, through its walls at right angles to the bar for receiving the cutter 15 when the position of the bar is reversed. The bore of the bar 12 is screw-threaded as shown at 18 at both of its ends for receivinga clamping screw 19.

A rod 20 is interposed between the inner end of the screw 19 and the cutter l5 so that as the Screw 19 is screwed inwardly against one end of the bar 2O the other end of the said bar will engage the cutter 15 and clamp it rigidly in its adjusted position.

In operation: After thetool has been in* is adjusted rotatively and the tool is adjusted both rotatively and longitudinally to bring its cutter 15 into the desired position with respect to the work to be operated upon. The nut 11 is then screwed inwardly drawing the free ends of the clamping ring 3 toward each other and drawing the clamping ring into snug engagement with the slide rest 1 thus serving to draw the parts of the divided bushing into clamping enf` gagement with the tool for clamping the tool in its adjusted position and drawing the ring 3 into snug engagement with the divided bushing for clamping the bushing in its adjusted position and for drawing the rings also into snug engagement with the slide rest for clamping the holder in position on the slide rest.

It will thus be seen that a single bolt serves to accomplish three purposes, the

serted into the divided bushing, the bushing clamping of the outer member of the holder to the slide rest, the clamping of the inner member of the holder to the outer member, and the clamping of the tool Within the inner member. It Will also be seen that by this arrangement the cutting edge of the tool may be adjusted to any desired rotative or longitudinal position Within prescribed limits by a very simple and effective means.

IVhile I have shown this invention as applied to a boring tool holder for engine lathes, it is to be understood that I do not Wish to limit myself to the particular structure and application herein shown but contemplate its use Wherever applicable and also that I do not Wish to limit myself strictly to the construction of the parts herein shown and described, but

l. A tool holder comprising a split outer member, a rotatably adjustable inner member having a plurality of tool receiving` holes therethrough, said inner member being divided through said holes and means for clamping the inner member to the outer member in any of its rotative adjustments.

2. A slide rest, a tool holder mounted thereon comprising a split outer member, a tool holding divided inner member rotatably adjustable in the outer member and a bolt arranged to clamp the inner member to the outer member and the outer member to the slide rest.

3. A slide rest, a tool holder mounted thereon comprising a split outer member, a tool holding divided inner member rotatably adjustable in the outer member and a bolt arranged to clamp the inner member to the outer member and the outer member to the slide rest, the said bolt intersecting the periphery of the divided inner member for holding it against longitudinal movement Within the outer member.

In testimony, that I claim the foregoing as my invention, I have signed my name in presence of two Witnesses, this twentieth day of April 1911.

ERNEST STOECKLIN.

`Witnesses F. GEORGE BARRY, C. S. SUNDGREN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patentsy Washington, D. C. 

